Question

Recursive formula for a geometric sequence with a starting value of 8 and a common ratio of 5

Answer 1

`a_2=5a_1`

`a_3=5a_2`

`a_4=5a_3`
...

`a_n=5a_(n-1)`

So the recursive formula is


`\begin{cases}a_1=8\\a_n=5a_(n-1)&\text{for }n>1\end{cases}`